I have family that doesn't live in a large or even a medium sized town, their water tastes terrible, you put a filter on it (PUR, Brita) and it still tastes bad

I have family that doesn't live in a large or even a medium sized town, their water tastes terrible, you put a filter on it (PUR, Brita) and it still tastes bad. They almost have to buy bottled water for drinking. Not everyone lives in a city with good water treatment facilities. That alone is reason for them to buy bottled water but I'll add your fluoride facts to my conversations in the future.